The attacks came amid a surge in violence that has killed more than 2,500 people already this year, including upwards of 250 so far this month.
The toll from a wave of attacks in Iraq mainly targeting security forces and Shiites rose on Friday to 51 killed, 26 of them police and soldiers, security officials and doctors said.
A police station in Anbar's provincial capital Ramadi came under attack in the morning in an assault that left two policemen dead, provincial council member councilman Talib Hamadi and deputy provincial governor Dhari Arkan said. Arkan said gunmen opened fire on the police station after a car bomb exploded nearby
The violence is part of a sustained campaign of militant attacks since the start of the year that has prompted warnings of wider conflict in a country where ethnic Kurds, Shi'ite and Sunni Muslims have yet to find a stable power-sharing compromise
Earlier in the day, seven policemen were killed in attacks in the western province of Anbar, Iraq's Sunni heartland.
Antagonistic rhetoric emanates from mosques on both sides. Sunni tribes in western Anbar province announced the setting up of a tribal army to defend demonstrators and Shiite militia chiefs called on their ranks to crush the Sunni protests
Surveying the national landscape earlier this year, he wrote: ''Armed civilian militias are reactivating, tit-for-tat bombings are targeting Sunni and Shiite mosques, and some Iraqi military forces are breaking down into ethnic-sectarian components or suffering chronic absenteeism.
In April alone, more than 700 people were killed in bomb and gun attacks, mostly in Shiite districts. The monthly rate of violent incidents has more than doubled in two years - up from 358 in the first quarter of 2011 to 804 in the first months of this year, according to Knights.
''Numerous segments of Iraq's body politic - Kurdish, Sunni Arab and Shiite - are exasperated over the government's inability to address political or economic inequities, and are talking seriously about partition.''
There are reports of the emergence of a well organised, funded and home-grown Sunni movement, comprised of former Ba'athists and members of Saddam Hussein's Republican Guard, Called Men of the Army of the Naqshbandi Order and reportedly led by Izzat Ibrahim al-Douri, the most senior of Hussein's lieutenants to have evaded capture, it sells itself as the protector of Sunnis and a guard against Iranian influence.
For much of this year, the Sunnis, a minority that nevertheless accounts for more than 30 per cent of the population, have been mounting Arab Spring-style protests. They had the run of the country under Hussein but complain of discrimination and marginalisation under Maliki.
Analysts warn that a seeming thaw between Maliki and Kurdish leader Massoud Barzani, when they hugged and back-slapped for the cameras in June, has left many issues that could trigger conflict unresolved.
Yoram Schweitzer, a terrorism expert at the Institute for National Security Studies, a Tel Aviv think tank, said that even a weakened Hezbollah still can hurt Israel.
"In spite of its dire straits situation in Syria, mainly, the way it was equipped with very sophisticated armament and training by states is still posing a threat to Israel,"
Schweitzer said. No matter how many fighters Hezbollah loses, he argued, it maintains the ability "to send many rockets to Israel to devastate the country."
A Must See Documentary
Bush's War, a two part documentary that outlines the fabrication, escalation, invasion and aftermath of the U.S. occupation of Iraq
It's easily one of the most notable inquiries on the topic. Watching it online gives you access to an interactive experience that's completely unparalleled by regular TV. As interviews occur, links pop up for more in-depth analysis of particular clips and extra information in general. Over 400 hours of footage was shot for the project and essentially all of it is available Online, for free, courtesy of Frontline and the Public Broadcasting Service.